Method of forming glass shapes.



ness while still retaining its plasticity, the

ridges. 5 will settle down or @my bach along'` the surface of the sheet, leaving the shape with a flattop or surface. Theretore,ivhere it is desired to retain the raised edgd permanently on the edge of the glass article, the stamping of the die e should be done after the sheet has sti'tiened sutliiently to retain theshape caused by the displacement or the glass. This raised edge will be found,

in the lcase of table tops, .icecream counters, plates for Weighing scales,`and other articles Where'- it is desirable to prevent the flow of liquids which may escape or be spilled from the substance placed thereon. The displacement of the' glessis only partially through the slfet, leaving the film-like connecting portion 7 between the shape and the body portion of the sheet. After the shape is partially formed vin the manner above described,' the sheet of glass containing the shape is placed in. a reverse posit-ion Within the suitable receptacle 8 and clamped in po sition by means of the suitable clam s 9, after which the suitable cutter l() con orming to the diameter of the shape and under 1 which the shape is mounted, by the clamps 9, in registry therewith, is brought ijnto contact with the reverse side of the sheet and the thin film 7 ground or cut so as to sever the vshape from the body of the sheet. This cutting by the tool 10 is preferably eiected by placing within the receptacle 8 a suitable cutting or'grinding medium such as ernery and Water or sand and water and causing the tool 10 to act as a lead therefor, said ,lead feeding the grinding material to the sheet at points registering with the-.iine of displacement, formed by the die 4C.

The shape may be annealed either before itA is severed from the sheet, that is, before it goes to the cuttiwd tool 10,'b/iifafter it has been severed tilt-Jin the sheet.

As the portion 7 of the glass to be cut is.

of little thichnesd, thel cutting or grinding by the Itool l0 can be done u'fithout any danger of splintering or spoiling the shape,

thereof, in connection with a certain form of apparatus, l do not 'desirevto limit-myself thereto. A

What claim and desire to secure by Letters Patent is: p

The method of forming shapes otglass- Ware. having a glaged surface and rounded periphery, which comprises producing a sheet of plastic glass, displacing the glass4 inwardly upon the peripheral outline of the desired shape while it is, still plastic but after it has'stiffened sufiiciently to retain the shape caused by the displacement, and to forni a surface glaze, thereby forming a raised-rounded rim or periphery andA leaving the glaze of the main body of the sheet undisturbed, allowing the glass to cool, positioning the sheet to bring saidy outline 'in lregistry with cutting means, and then sepa- `rating the shape from the sheetI by cutting the sheet upon the reverse side from said formed outline'.

In testimony whereof, l have hereunto set my hand.'

WHLIAM BUTTLE R.

Witnesses l:

CEAS. HALL, l'VAL'rnn S'inwAicT.

by those skilled in the 

